// 工具类名统一前缀
$prefix: f;

// 填满父元素
// 组要父元素 position: relative | absolute;
%full {
  position: absolute;
  top: 0px;
  right: 0px;
  bottom: 0px;
  left: 0px;
}

// flex 垂直水平居中
%flex-center-row {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: row;
}
// flex 垂直纵向居中
%flex-center-col {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
